Hamamatsu-photonics K.k.

Inter-university Research Institute Corporation

Inter-university Research Institute Corporation National Sciences

Taro Ando

Yoshiyuki Ohtake

Haruyoshi Toyoda

Naoya Matsumoto

Takashi Inoue

Yuu Takiguchi

Hiroto Sakai

Tomoko Hyodo

Norihiro Fukuchi

Haruyasu Ito

Kenji Ohmori

Nobuyuki Takei

Hiroyasu Itoh

Tomoko Otsu

A pseudo speckle pattern generation apparatus includes a light source, a beam expander, and a spatial light modulator. The spatial light modulator has an intensity modulation distribution based on a pseudo speckle pattern calculated from a pseudo random number pattern and a correlation function, receives light output from the light source and increased in beam diameter by the beam expander, spatially modulates the received light according to the modulation distribution, and outputs modulated light.

Pseudo speckle pattern generation device, pseudo speckle pattern generation method, observation device, and observation method

A quantum simulator includes a pseudo speckle pattern generator, a main vacuum chamber, an atomic gas supply unit, a light beam generator, a photodetector, and an atom number detector. The pseudo speckle pattern generator generates a pseudo speckle pattern in the inside of the main vacuum chamber by light allowed to enter the inside of the main vacuum chamber through the second window. The pseudo speckle pattern generator includes a controller, a light source, a beam expander, a spatial light modulator, and a lens. The controller sets a modulation distribution of the spatial light modulator based on a two-dimensional pseudo random number pattern.

Quantum simulator and quantum simulation method

A pseudo speckle pattern generation apparatus includes a first spatial light modulator, a first lens, a second spatial light modulator, a second lens and the like. The first spatial light modulator has a first intensity modulation distribution based on a pseudo random number pattern, and spatially modulates intensity of light output from a light source and increased in beam diameter by a beam expander. The second spatial light modulator has a second intensity modulation distribution based on a filter function, is provided on a plane where a Fourier transformed pattern is generated by the first lens, and spatially modulates intensity of the light reached through the first lens. The second lens optically Fourier transforms a pattern of the light output from the second spatial light modulator to generate a Fourier transformed pattern as a pseudo speckle pattern.

A quantum simulator includes a pseudo speckle pattern generator, a main vacuum chamber, an atomic gas supply unit, a light beam generator, a photodetector, and an atom number detector. The pseudo speckle pattern generator generates a pseudo speckle pattern in the inside of the main vacuum chamber by light allowed to enter the inside of the main vacuum chamber through the second window. The pseudo speckle pattern generator includes a controller, a light source, a beam expander, a spatial light modulator, and a lens. The controller sets a modulation distribution of the spatial light modultor based on a two-dimensional pseudo random number pattern.

A micro object control apparatus for controlling motion of a micro object within a medium includes a light source, an optical vortex generation unit, an objective lens, an imaging unit, an analysis unit, and a movement unit. The analysis unit acquires first motion information of the micro object based on the image data in which the micro object optically trapped with the optical vortex is imaged by setting the focal position of the optical vortex to a first position, acquires second motion information of the micro object based on the image data in which the micro object optically trapped with the optical vortex is imaged by setting the focal position of the optical vortex to a second position, and evaluates a state of an optical trap of the micro object with the optical vortex by comparing the first motion information and the second motion information.

Particle control device

A light control deviceincludes a light source, a prism, a spatial light modulator, a drive unit, a control unit, a lens, an aperture, and a lens. The spatial light modulatoris a phase modulating spatial light modulator, includes a plurality of two-dimensionally arrayed pixels, is capable of phase modulation in each of these pixels in a range of 4&#x3c0; or more, and presents a phase pattern to modulate the phase of light in each of the pixels. This phase pattern is produced by superimposing a blazed grating pattern for light diffraction and a phase pattern having a predetermined phase modulation distribution, and with a phase modulation range of 2&#x3c0; or more.

Light control device and light control method

A light control deviceincludes a light source, a prism, a spatial light modulator, a drive unit, a control unit, a lens, an aperture, and a lens. The spatial light modulatoris a phase modulating spatial light modulator, includes a plurality of two-dimensionally arrayed pixels, is capable of phase modulation in each of these pixels in a range of 4&#x3c0;, and presents a phase pattern to modulate the phase of light in each of the pixels. This phase pattern is produced by superimposing a blazed grating pattern for light diffraction with a phase modulation range of 2&#x3c0; or less and a phase pattern having a predetermined phase modulation distribution with a phase modulation range of 2&#x3c0; or less.

A light source deviceincludes a laser light sourceand an optical phase modulatoror the like. The optical phase modulatorinputs coherent light output from the laser light sourceand transmitted through a beam splitter, phase-modulates the light according to the position on a beam cross section of the light, and outputs the phase-modulated light to the beam splitter. When (p+1) areas sectioned by p circumferences centered on a predetermined position are set on a beam cross section of light input to the optical phase modulator, the more outside each of the (p+1) areas is, the wider the radial width of the area, the amount of phase modulation is constant in each of the (p+1) areas, and the amounts of phase modulation differ by &#x3c0; between two adjacent areas out of the (p+1) areas.

Light source device, observation device, and processing device

A laser light sourceis provided with a first reflection mirror, a laser medium, an aperture, an output mirror, a half mirror, a light beam diameter adjuster, and a second reflection mirror, and outputs laser oscillation lightreflected by the half mirrorto the outside. The main resonator is composed by the first reflection mirrorand the output mirrordisposed so as to be opposed to each other with the laser mediumplaced therebetween. The external resonator is composed by the output mirrorand the second reflection mirrordisposed so as to be opposed to each other. The second reflection mirroris configured such that it gives amplitude or phase variations to respective positions in the section of a light beam when the light is reflected, the second reflection mirror presents an amplitude or phase variation distribution, and determines the transverse mode of the laser oscillation lightbased on the amplitude or phase variation distribution. Thus, a laser light source capable of easily controlling the transverse mode of the laser oscillation light can be realized.

Laser light source

This optical mask is an optical mask which applies spatial intensity modulation to input light in a beam cross-section and outputs a light after being subjected to the modulation, and when regions Ato Adefined by circumferences with p radiuses rto r(p is an even number, r&#x3e;r&#x3e; . . . &#x3e;r&#x3e;r, and r&#x2212;r&#x3e;r&#x2212;r&#x3e; . . . &#x3e;r&#x2212;r&#x3e;r&#x2212;r&#x3e;r) around a predetermined position are set in order from an inner side, a region A(m is an even number not less than 0 and not more than p) is a light transmission region, and a region A(n is an odd number not less than 0 and not more than p) is a light shielding region.

Optical mask, and light source device

The light beam generatoris provided with a laser light source, an optical phase modulation elementand others. The optical phase modulation elementreceives coherent light output from the laser light sourceand passed through a beam splitterto modulate a phase of the light depending on a position on the beam cross section of the light, and outputs the light after the phase modulation to the beam splitter. A polar coordinate system (r, &#x3b8;) in which a predetermined position is given as an origin is set on the beam cross section of the light input in the optical phase modulation element, and when (p+1) domains divided by p (number of pieces) circumferences in which the predetermined position is given as a center are set, of these (p+1) domains, a phase modulation amount &#x3c6; at each position inside an even numbered domain counted from the inside is expressed by a formula of '&#x3c6;=q&#x3b8;', and a phase modulation amount &#x3c6; at each position inside an odd numbered domain counted from the inside is expressed by a formula of '&#x3c6;=q&#x3b8;+&#x3c0;'.

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Hamamatsu, Japan

Taro Ando